7051021 has 4 divisors (see below), whose sum is σ = 7062172. Its totient is φ = 7039872.

The previous prime is 7051019. The next prime is 7051049. The reversal of 7051021 is 1201507.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3861225 + 3189796 = 1965^2 + 1786^2 .

It is a cyclic number.

It is not a de Polignac number, because 7051021 - 2¹ = 7051019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 7050986 and 7051004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7051001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4566 + ... + 5911.

It is an arithmetic number, because the mean of its divisors is an integer number (1765543).

Almost surely, 2^7051021 is an apocalyptic number.

It is an amenable number.

7051021 is a deficient number, since it is larger than the sum of its proper divisors (11151).

7051021 is a wasteful number, since it uses less digits than its factorization.

7051021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11150.

The product of its (nonzero) digits is 70, while the sum is 16.

The square root of 7051021 is about 2655.3758679328. The cubic root of 7051021 is about 191.7567539538.

Adding to 7051021 its reverse (1201507), we get a palindrome (8252528).

The spelling of 7051021 in words is "seven million, fifty-one thousand, twenty-one".